Boker BK-110190DAM Tirpitz, Aluminum Handle w/Wood Inlay, Damascus, PlainEdge. The Boker Tirpitz Damascus Knife features a 3.875 Spearpoint blade made of a combination of hand forged 300-layer Damascus steel from the retrieved parts of the special armor of the German battleship Tirpitz and carbon tool steels. The blade features a Great Pyramids Damascus pattern, a top swedge grind and a thumb stud for one-hand opening. The lightweight hard anodized handle is made of AIMgSi1 aluminum with a hand selected domestic Walnut wood inlay with the original Tirpitz crest etched into the wood and a liner locking mechanism.